Effect of freezing on DNA methylation?

Well, it was a bit surprising to me that my account doesn't exist but ok, now I understand why.
So my question is: do you think it has any effect if I freeze cells before izolate DNA for BS studies...? Can freezing change methylation status of promoter? I haven't read anything about it but maybe it is important...

I don't think freezing cells or dna significantly alters the methylation state. I've tried to digest previously frozen vector with an enzyme inhibited by methylation and the digest did not work. (oops)